NGC 7251
| Galaxy NGC 7251 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Aquarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 22 h 20 m 27.1 s |
| declination | -15 ° 46 ′ 25 ″ |
| Appearance | |
| Morphological type | (R ') SA (rs) a? |
| Brightness (visual) | 12.6 mag |
| Brightness (B-band) | 13.5 likes |
| Angular expansion | 1.9 'x 1.7' |
| Position angle | 0 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 458 |
| Redshift | 0.016231 ± 0.000010 |
| Radial velocity | 4866 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(221 ± 16) x 10 6 ly (67.9 ± 4.8) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 6, 1793 |
| Catalog names | |
| NGC 7251 • PGC 68604 • MCG -03-57-002 • IRAS 22177-1601 • 2MASX J22202715-1546246 • GC 4779 • H III 933 • h 2158 • GALEX ASC J222027.15-154624.3 • LDCE 1518 NED001 | |
NGC 7251 is a spiral galaxy of Hubble type Sa in the constellation Aquarius on the ecliptic . It is estimated to be 221 million light years away from the Milky Way and has a diameter of around 125,000 ly.
In the same area of the sky are the galaxies NGC 7246 and NGC 7255 , among others .
The object was discovered by Wilhelm Herschel on September 6, 1793 .